When Chen Kang, a history graduate student from the 21st century, transmigrates into the son of Chen Gong, a strategist at the end of the Eastern Han dynasty, the compass in his hand and the historical knowledge in his mind become an unexpected key to stirring up the chaotic age. On the eve of Xiapi's fall in the third year of Jian'an, he must face not only Lu Bu's stubbornness and Cao Cao's ingenious plan to flood the city, but also break through the siege at the White Gate Tower with Lu Bu's daughter, Lu Qiling, the famed general Zhang Liao, and the remnants of their forces, beginning an exile that will rewrite fate through technological innovation.
From a nighttime voyage by tower ship on the journey from Qugang to the first glow of blast furnaces in Xiangping, Liaodong, Chen Kang combines modern metallurgical knowledge with the ancient techniques of the Kaogong Ji. He forges black iron weapons with the fining process and improves military farming through the pit-planting method, establishing a technological edge between Gongsun Du and Cao Cao. Lu Qiling's Sky Piercer halberd and his bronze counting rods shine in tandem. From iron plows breaking enemy formations at the Battle of the Wenshui to yellow crossbows piercing the clouds at Liucheng, they lead the Trapped Camp and the Phoenix Cavalry, building the seeds of a civilization beyond its age from steel and provisions across the lands of the Wuhuan and Goguryeo.
The story is grounded in meticulous archaeological details from the Han dynasty, such as the fining furnaces of Gong County and the watertight bulkhead ships of Guangzhou, while political intrigue gives it life. It fuses the historical turmoil of the Battle of Guandu with a fictional tale of expansion east across the sea. Chen Kang is no longer a transmigrator watching history from the sidelines, but a practical man who breaks through with technology. What he and Lu Qiling forge amid the chaos is not just sharp steel, but the resilience needed to preserve civilization. As the compass needle finally points toward the battlefield at Guandu, a game for the realm, wagered on iron and ingenuity, slowly begins.